About the Authors
Institute of Ecosystem Studies, Millbrook, New York, United States of America
Department of Biology, Bard College, Annandale-on-Hudson, New York, United States of America
The authors have declared that no competing interests exist.
RSO conceived and designed the experiments. KO and RJW performed the experiments. RSO, CDC, and FK analyzed the data. CDC contributed reagents/materials/analysis tools. RSO and CDC wrote the paper.